[10] Review request for 8187594: Media crashes with libavcodec 57 on Ubuntu 17.04 32-bit

[Alexander Matveev]

Hi Kevin and David,

Please review the following:
http://cr.openjdk.java.net/~almatvee/8187594/webrev.00

Fixed crash by preloading avplugin on separate thread on 32-bit Linux.

Thanks,
Alexander